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Light & Optics
Physics 265 Light & Optics Exam 2
14
Physics
Undergraduate 2
05/13/2015

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Term
When light travels from a medium of a lower index of refraction to higher, the wavelength of the light __________.
Definition
decreases.
Term
A wire of constant linear charge density is cut into two pieces where the first piece is longer than the second. How do their linear charge densities compare?
Definition
(Lamda)1 = (Lambda)2
Term
Which of the following particles have a net negative charge? Proton, Neutron, Electron, Photon
Definition
Electron
Term
The net charge on any object is always ___________.
Definition
quantized.
Term
Which of the following is a good conductor? Wood, Silver, Plastic, Rubber.
Definition
Silver
Term
What conditions must be true to have total internal reflection?
Definition
n(1) > n(2)
Term
Which of the following is not a primary color of light? Green, Blue, Red, Yellow
Definition
Yellow
Term
What condition will always produce a virtual image?
Definition
s < |f|
Term
True or False: A concave mirror has a negative focal length according to the sign convention.
Definition
False.
Term
True or False: Charge polarization is the slight separation of opposite charges in a neutral object.
Definition
True.
Term
The electric field of a charge is defined by the force on what kind of charge?
Definition
A positive test charge.
Term
Which of the following particles have a net positive charge? Proton, Neutron, Electron, Photon.
Definition
Proton.
Term
What are the units of the electric field?
Definition
N/C (Newtons per Coulomb)
Term
True or False: The denser the electric field lines, the weaker the electric field.
Definition
False.
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